1 #ifndef _IP_H_
2 #define _IP_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 
7 /*
8 #pragma	src	"/sys/src/libip"
9 #pragma	lib	"libip.a"
10 #pragma	varargck	type	"I"	uchar*
11 #pragma	varargck	type	"V"	uchar*
12 #pragma	varargck	type	"E"	uchar*
13 #pragma	varargck	type	"M"	uchar*
14 */
15 enum 
16 {
17 	IPaddrlen=	16,
18 	IPv4addrlen=	4,
19 	IPv4off=	12,
20 	IPllen=		4,
21 };
22 
23 /*
24  *  for reading /net/ipifc
25  */
26 typedef struct Ipifc Ipifc;
27 typedef struct Iplifc Iplifc;
28 typedef struct Ipv6rp Ipv6rp;
29 
30 /* local address */
31 struct Iplifc
32 {
33 	Iplifc	*next;
34 
35 	/* per address on the ip interface */
36 	uchar	ip[IPaddrlen];
37 	uchar	mask[IPaddrlen];
38 	uchar	net[IPaddrlen];		/* ip & mask */
39 	ulong	preflt;			/* preferred lifetime */
40 	ulong	validlt;		/* valid lifetime */
41 };
42 
43 /* default values, one per stack */
44 struct Ipv6rp
45 {
46 	int	mflag;
47 	int	oflag;
48 	int 	maxraint;
49 	int	minraint;
50 	int	linkmtu;
51 	int	reachtime;
52 	int	rxmitra;
53 	int	ttl;
54 	int	routerlt;	
55 };
56 
57 /* actual interface */
58 struct Ipifc
59 {
60 	Ipifc	*next;
61 	Iplifc	*lifc;
62 
63 	/* per ip interface */
64 	int	index;			/* number of interface in ipifc dir */
65 	char	dev[64];
66 	uchar	sendra6;		/* on == send router adv */
67 	uchar	recvra6;		/* on == rcv router adv */
68 	int	mtu;
69 	ulong	pktin;
70 	ulong	pktout;
71 	ulong	errin;
72 	ulong	errout;
73 	Ipv6rp	rp;
74 };
75 
76 /*
77  *  user level udp headers
78  */
79 enum 
80 {
81 	Udphdrsize=	36,	/* size of a Udphdr */
82 };
83 
84 typedef struct Udphdr Udphdr;
85 struct Udphdr
86 {
87 	uchar	raddr[IPaddrlen];	/* remote address and port */
88 	uchar	laddr[IPaddrlen];	/* local address and port */
89 	uchar	rport[2];
90 	uchar	lport[2];
91 };
92 
93 uchar*	defmask(uchar*);
94 void	maskip(uchar*, uchar*, uchar*);
95 int	eipfmt(Fmt*);
96 int	isv4(uchar*);
97 ulong	parseip(uchar*, char*);
98 ulong	parseipmask(uchar*, char*);
99 char*	v4parseip(uchar*, char*);
100 char*	v4parsecidr(uchar*, uchar*, char*);
101 int	parseether(uchar*, char*);
102 int	myipaddr(uchar*, char*);
103 int	myetheraddr(uchar*, char*);
104 int	equivip(uchar*, uchar*);
105 long	udpread(int, Udphdr*, void*, long);
106 long	udpwrite(int, Udphdr*, void*, long);
107 
108 Ipifc*	readipifc(char*, Ipifc*, int);
109 
110 void	hnputv(void*, uvlong);
111 void	hnputl(void*, uint);
112 void	hnputs(void*, ushort);
113 uint	nhgetl(void*);
114 uvlong	nhgetv(void*);
115 ushort	nhgets(void*);
116 ushort	ptclbsum(uchar*, int);
117 
118 int	v6tov4(uchar*, uchar*);
119 void	v4tov6(uchar*, uchar*);
120 
121 #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)
122 #define	ipmove(x, y) memmove(x, y, IPaddrlen)
123 
124 extern uchar IPv4bcast[IPaddrlen];
125 extern uchar IPv4bcastobs[IPaddrlen];
126 extern uchar IPv4allsys[IPaddrlen];
127 extern uchar IPv4allrouter[IPaddrlen];
128 extern uchar IPnoaddr[IPaddrlen];
129 extern uchar v4prefix[IPaddrlen];
130 extern uchar IPallbits[IPaddrlen];
131 
132 #define CLASS(p) ((*(uchar*)(p))>>6)
133 
134 #if defined(__cplusplus)
135 }
136 #endif
137 #endif